JP2024506705A - Improved long-lasting sunscreen cosmetics - Google Patents

Abstract

The present invention provides a sunscreen composition comprising: 5 to 50% by weight of at least one UV protection agent; 0.05 to 5% by weight of at least one hydrophobized clay mineral; 1 to 60% by weight of an oil component; and 0.1 to 4% by weight of at least one associative polymer. The present invention also provides a method of achieving improved sunscreen protection with desired film morphology and superior durability. [Selection diagram] None

Description

The present invention relates to the field of sunscreen compositions, ie compositions that, when applied to the skin, protect the skin from the damaging effects of ultraviolet radiation. More particularly, the present invention provides sunscreen compositions that provide long-lasting and water-resistant films. More particularly, the present invention relates to a method of achieving improved sunscreen efficacy exhibiting long-lasting and water-resistant properties by applying the present compositions to the skin.

In recent years, awareness of the damaging effects of solar ultraviolet radiation has increased among the general public. As a result, the use of sunscreen compositions when spending time in the sun has become commonplace.

A challenge in formulating sunscreen compositions is producing compositions that have sufficient persistence, ie, that are retained on the skin. There is no doubt that the ability of a sunscreen composition to remain in the same location on the user's skin throughout the user's time in the sun is linked to its effectiveness. Therefore, it is important that the composition is resistant to being rubbed off or washed away with water.

More recently, sunscreen compositions have been developed which can form a fully integrated film and thus exhibit improved durability, e.g. long-lasting, good water and scratch resistance as well as anti-dust action. Demand continues to rise.

International Publication No. 2016/068298A1 pamphlet describes a water-in-oil emulsion sunscreen makeup that has improved UV protection upon contact with moisture and/or sweat, feels good on use, and can be easily washed off. Fees are disclosed. However, the disclosed sunscreen compositions fail to achieve desirable water and abrasion resistance.

Therefore, in view of the above-mentioned problems, it was an object of the present invention to provide a sunscreen composition that exhibits the desired durability, e.g. long-lasting and good resistance to water, scratches and dust, while having an advantageous UV protection effect. It is about providing.

In one aspect, the invention provides:
a) 5 to 50% by weight of at least one UV protection agent;
b) 0.05 to 5% by weight of at least one hydrophobized clay mineral;
c) 1 to 60% by weight of at least one oil component;
d) 0.1 to 4% by weight of at least one associative polymer;
A sunscreen composition comprising:

In one embodiment, the sunscreen composition of the present invention comprises a silicone acrylate polymer; a (meth)acrylic ester of an ethoxylated fatty alcohol; Copolymers with monomers; copolymers of itaconic esters of ethoxylated fatty alcohols with one or more monomers of acrylic acid, methacrylic acid or one of their simple esters; and acrylamide methylpropane. The associative polymer is selected from the group consisting of: a copolymer based on sulfonic acid and (meth)acrylic acid ester of an ethoxylated fatty alcohol. Preferably, the associative polymer is a copolymer of a (meth)acrylic ester of an ethoxylated fatty alcohol and one or more monomers that are acrylic acid, methacrylic acid or one of their simple esters; copolymers of itaconic acid esters of ethoxylated fatty alcohols with one or more monomers of acrylic acid, methacrylic acid or one of their simple esters; copolymers based on (meth)acrylic esters; the ethoxylated (EO) fatty alcohols contain in each case 5 to 35, in particular 7 to 30 ethylene oxide (EO) residues; , more specifically, 7 to 25. More preferably, the sunscreen composition of the present invention comprises (acrylates/beheneth methacrylate-25) copolymer, (acrylates/steareth methacrylate-20) copolymer, (acrylates/steareth methacrylate-20) crosspolymer, (acrylate /steareth itaconate-20) copolymer; (acrylates/cetheth itaconate-20) copolymer and (acrylates/palmeth25 itaconate copolymer), (ammonium acryloyldimethyltaurate/beheneth methacrylate-25) Copolymer (ammonium acryloyldimethyltaurate/beheneth-25-methacrylate copolymer), (ammonium acryloyldimethyltaurate/beheneth-25 methacrylate) crosspolymer, (ammonium acryloyldimethyltaurate/steareth methacrylate-25) cross Polymer, (acryloyldimethyltaurate ammonium/methacrylic the associative polymer selected from the group consisting of (acryloyl dimethyl taurate ammonium/methacrylic acid laureth-7) copolymers and combinations thereof.

In one aspect, the sunscreen composition of the present invention comprises ethylhexyl methoxycinnamate (Uvinul® MC80), ethylhexyl triazone (Uvinul® T150), methylenebisbenzotriazolyltetramethylbutylphenol (Tinosorb (registered trademark) M), bisethylhexyloxyphenol methoxyphenyl triazine (Tinosorb (registered trademark) S), hexyl diethylaminohydroxybenzoylbenzoate (Uvinul (registered trademark) A Plus Granular), ethylhexyl salicylate (Neo Heliopan OS), and these a UV protection agent selected from the group consisting of:

In a further aspect, the sunscreen composition of the invention comprises stearalkonium bentonite, dimethyldistearammonium hectorite, disteardimonium hectorite, dimethylalkylammonium hectorite, benzyldimethylstearylammonium hectorite, A hydrophobized clay mineral selected from the group consisting of magnesium aluminum silicate treated with distearyldimethylammonium chloride and combinations thereof, preferably disteardimonium hectorite.

In other embodiments, the sunscreens of the present invention are emulsifier-free sunscreen compositions.

In yet another aspect, the invention provides a method for improving sunscreen protection comprising applying a sunscreen composition of the invention.

In yet another aspect, the invention relates to the use of the sunscreen compositions of the invention for sunscreen protection of the skin.

Surprisingly and unexpectedly, the present application now discloses that the sunscreen compositions of the present invention form a fully integrated film with the desired film morphology and, as a result, are long-lasting. By exhibiting improved durability, such as durability and very good resistance to water, scratches and dust, it is possible to provide the desired UV protection effect and thus to achieve the objectives outlined above. I found out.

Throughout this specification, including the claims, the terms “comprising one” or “comprising a” refer to “at least one The term "including" should be understood as synonymous with the term "including," and the term "between" should be understood to include boundary values.

The indefinite articles "a", "an" and the definite article "the" are used to refer to one or more than one (ie, at least one) of the grammatical object of the article.

The term "and/or" in addition to the meanings of "and" and "or" also encompasses all other possible combinations of the elements with which this term is associated.

As used herein, the term "% by weight" refers to a percentage of the total weight of the composition.

When defining any range of concentrations, weight ratios or amounts, it should be noted that any specified upper concentration limit, weight ratio or amount may be accompanied by any specified lower concentration limit, weight ratio or amount, respectively. It is.

The term "sunscreen composition" as used herein means a composition for topical application to sun-exposed areas of the skin and/or hair of a mammal, particularly a human. Compositions of this type can be broadly divided into leave-in or wash-off types, and are any compositions applied to the human body to improve appearance, cleanse, control odor or even general cosmetics. Also includes products. Leave-on products are more preferred. The compositions of the invention may be in the form of liquids, lotions, creams, foams, scrubs, gels or toners, or may be applied using a device or via a face mask, cosmetic pad or patch. Can be applied. Non-limiting examples of sunscreen compositions of this type include leave-on lotions, creams, antiperspirants, deodorants, lipsticks, foundations, mascaras, sunless tanning agents, and sunscreen lotions. As used herein, "skin" includes the skin of the face and body (e.g., neck, chest, back, arms, armpits, hands, legs, buttocks and scalp), especially those areas exposed to the sun. is intended. The compositions of the invention are also relevant for application to any other keratinous material of the human body other than the skin, such as hair, in which case the product is formulated for the specific purpose of providing photoprotection. can do.

As used herein, the term "associative polymer" refers to any amphiphilic polymer that includes at least one fatty chain, ie, a hydrophobic portion, and at least one hydrophilic portion.
As used herein, "emollient" refers to a material used to prevent or alleviate dryness of the skin or to protect the skin.

As used herein, the term "emulsifier-free" intends a composition that is substantially free of emulsifier, which means that the composition contains about 1 weight emulsifier based on the total weight of the composition. Indicates that it contains less than %.

Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains.

All percentages, parts and ratios are by weight unless otherwise specified. All such weights for ingredients listed are, unless otherwise specified, based on the level of the raw materials specifically mentioned and, therefore, are based on the level of carriers that may be included in commercially available materials. or by-products are not included.

The present invention is a sunscreen composition comprising:
a) 5 to 50% by weight of at least one UV protection agent;
b) 0.05 to 5% by weight of at least one hydrophobized clay mineral;
c) 1 to 60% by weight of at least one oil component;
d) 0.1 to 4% by weight of at least one associative polymer;
A sunscreen composition comprising:

UV Protection Agents The sunscreen compositions of the present invention contain at least one UV protection agent (also known as a UV screening agent) or a combination of UV protection agents in an amount of 5% by weight, based on the weight of the composition. or in a concentration of about 5% to 50% or about 5% to 20%, 25%, 30%, 35%, 40% or 45%. The ultraviolet protective agent suitable for the present invention consists of at least one selected from ultraviolet absorbers and ultraviolet scattering agents that are commonly included in conventional sunscreen compositions. The ultraviolet absorber used in the present invention is not particularly limited, but includes, for example, t-butylmethoxydibenzoylmethane, ethylhexyltriazone, drometrizole trisiloxane, oxybenzone-3, diethylhexylbutamide triazone, bisethylhexyloxy Phenolmethoxyphenyltriazine, 4-methylbenzilidenecamphor and/or benzoxazole compound, octocrylene, dimethicodiethylbenzalmalonate, polysilicone-15, t-butylmethoxydibenzoylmethane, ethylhexyltriazone, diethylaminohydroxybenzoyl Examples include, but are not limited to, hexyl benzoate, bisethylhexyloxyphenol methoxyphenyltriazine, oxybenzone-3, methylenebisbenzotriazolyltetramethylbutylphenol, phenylbenzimidazole sulfonic acid, homosalate, and ethylhexyl salicylate. Not done. The ultraviolet scattering agent used in the present invention is not particularly limited, but examples thereof include fine particles of metal oxides such as zinc oxide, titanium oxide, iron oxide, cerium oxide, and tungsten oxide. In some embodiments, the ultraviolet screening agent in the present invention is at least one selected from ultraviolet absorbers and ultraviolet scattering agents. In one embodiment, the ultraviolet screening agent of the present invention consists only of an ultraviolet absorber. In other embodiments, the UV-screening agents of the present invention consist solely of UV-scattering agents. In the present invention, the amount of each of the above-mentioned ultraviolet screening agents is expressed as the total amount of the ultraviolet absorber and the ultraviolet scattering agent, and the amount of the ultraviolet absorber is set to 6% or more based on the total weight of the composition. is particularly preferred.

As an example, a UV screening agent (also known as a UV protection agent) may be designated by its INCI name below:
Dibenzoylmethane compound:
t-Butylmethoxydibenzoylmethane, specifically available under the trade name Parsol 1789 from DSM Nutritional Products, Inc. sold by; isopropyldibenzoylmethane,
Para-aminobenzoic acid compound:
ethyl PABA,
Ethyl Dihydroxypropyl PABA,
Dimethyl PABA Ethylhexyl, sold by ISP under the name Escalol 507;
glyceryl PABA,
Salicylic acid derivatives:
homosalate, sold by Rona/EM Industries under the trade name Eusolex HMS; ethylhexyl salicylate, sold by SYMRISE under the trade name Neo Heliopan OS;
Cinnamic acid derivatives:
Ethylhexyl methoxycinnamate, sold by DSM Nutritional Products under the trade name ARSOL MCX;
Isopropyl paramethoxycinnamate,
Isoamyl para-methoxycinnamate, sold by SYMRISE under the trade name Neo Heliopan E1000;
Cinoxate,
Methyl diisopropylcinnamate.
Derivatives of β,β-diphenylacrylate:
Octocrylene, sold by BASF under the trade name Uvinul N539,
Etocrylene, sold by BASF under the trade name Uvinul N35,
Benzophenone derivatives:
Oxybenzone-1, sold by BASF under the trade name Uvinul 400,
Oxybenzone-2, sold by BASF under the trade name Uvinul D50,
Oxybenzone-3 or oxybenzone, sold by BASF under the trade name Uvinul M40,
Oxybenzone-6, sold by Norquay under the trade name Helisorb 11;
dioxybenzone-8, sold by American Cyanamid under the trade name Spectra-Sorb UV-24;
oxybenzone-12,
2-(4-N,N-diethylamino-2-hydroxybenzoyl, sold by BASF under the trade name Uvinul A Plus or in the form of a mixture with octyl methoxycinnamate under the trade name Uvinul A Plus B ) n-hexyl benzoate,
Benzylidene camphor derivatives:
3-Benzylidene camphor manufactured by CHIMEX under the trade name MEXORYL SD;
4-methylbenzylidene camphor, sold by MERCK under the trade name EUSOLEX 6300;
Polyacrylamidomethyl Benzylidene Camphor manufactured by CHIMEX under the trade name MEXORYL SW;
Phenylbenzotriazole derivatives:
Drometrizole trisiloxane, sold by RHODIA CHIMIE under the trade name Silatrizole;
Triazine derivative:
bisethylhexyloxyphenolmethoxyphenyltriazine, sold by BASF under the trade name Tinosorb S;
Ethylhexyltriazone, sold by BASF under the trade name Uvinul T150;
Diethylhexylbutamide triazone, sold by SIGMA 3V under the trade name UVASORB HEB;
Triazine silicones substituted with two aminobenzoate groups, in particular 2,4-bis-(n-butyl 4'-aminobenzalmalonate)-, as described in EP 0 841 341 6-[(3-{1,3,3,3-tetramethyl-1-[(trimethylsilyloxy]disiloxanyl})propyl)amino]-s-triazine,
Anthranilic acid derivatives:
Menthyl anthranilate sold by SYMRISE under the trade name Neo Heliopan MA.
Imidazole derivatives:
Ethylhexyldimethoxybenzylidene dioxoimidazoline propionate,
Benzalmalonate derivatives:
4'-methoxybenzalmalonate dineopentyl,
polyorganosiloxane with benzalmalonate groups sold by DSM NUTRITIONAL PRODUCTS under the trade name PARSOL SLX as polysilicone-15;
Derivatives of 4,4-diarylbutadiene:
1,1-dicarboxy(2,2'-dimethylpropyl)-4,4-diphenylbutadiene,
Benzoxazole derivatives:
2,4-bis-[5-1(dimethylpropyl)benzoxazol-2-yl-(4-phenyl)-imino]-6-(2-ethylhexyl) sold by Sigma 3V under the trade name Uvasorb K2A -imino-1,3,5-triazines and mixtures thereof,
Lipophilic merocyanine derivative:
octyl 5-N,N-diethylamino-2-phenylsulfonyl-2,4-pentadienoate,
as well as mixtures thereof.

In some preferred embodiments, the sunscreen compositions of the present invention include ethylhexyl methoxycinnamate (Uvinul® MC80), ethylhexyl triazone (Uvinul® T150), methylene bisbenzotriazolyl tetra Methylbutylphenol (Tinosorb® M); Bisethylhexyloxyphenol methoxyphenyl triazine (Tinosorb® S); Hexyl diethylaminohydroxybenzoylbenzoate (Uvinul® A Plus Granular); Ethylhexyl salicylate (Neo Heliopan OS) ).

The amount of UV protection agent present in the sunscreen composition ranges from 5% to 50%, especially from 8% to 40%, more particularly from 10% to 20%, 25% by weight of the total composition. %, 30% or 35% by weight.

Hydrophobized clay mineral A hydrophobized clay mineral is a type of colloidal hydrous aluminum silicate having a three-layer structure, and in the present invention, a clay mineral represented by the general formula (I) shown below is used. It is possible to use substances derived by modifying with cationic surfactants of the quaternary ammonium salt type:
(X, Y) _2-3 (Si, Al) ₄ O ₁₀ (OH) ₂ Z _1/3・nH ₂ O
(wherein, X=Al, Fe(III), Mn(III) or Cr(III), Y=Mg, Fe(II), Ni, Zn or Li, Z=K, Na or Ca) be).

The quaternary ammonium salt type cationic surfactant used herein is represented by the general formula (II) shown below:
N(R ¹ R ² R ³ R ⁴ )X
(In the formula, R ¹ represents a C _10-22 alkyl group or a benzyl group, R ² represents a methyl group or a C _10-22 alkyl group, and R ³ and R ⁴ each represent a C _1-3 alkyl group. or a hydroxyalkyl group; X represents a halogen atom or a methyl sulfate residue).

Typical examples of quaternary ammonium salt type cationic surfactants used in the present invention include, but are not limited to, dodecyltrimethylammonium chloride, myristyltrimethylammonium chloride, cetyltrimethylammonium chloride, stearyltrimethyl Ammonium chloride, arakyltrimethylammonium chloride, behenyltrimethylammonium chloride, myristyldimethylethylammonium chloride, cetyldimethylethylammonium chloride, stearyldimethylethylammonium chloride, arakyldimethylethylammonium chloride, behenyldimethylethylammonium chloride, myristyldiethylmethylammonium chloride , cetyldiethylmethylammonium chloride, stearyldiethylmethylammonium chloride, aralkyldiethylmethylammonium chloride, behenyldiethylmethylammonium chloride, benzyldimethylmyristylammonium chloride, benzyldimethylcetylammonium chloride, benzyldimethylstearylammonium chloride, benzyldimethylbehenylammonium chloride, Mention may be made of benzylmethylethylcetylammonium chloride, benzylmethylethylstearylammonium chloride and dibehenyldihydroxyethylammonium chloride and their corresponding bromides and dipalmitylpropylethylammonium methylsulfate.

Hydrophobized clays are known in the art. Typical examples are smectite clays such as hectorite, montmorillonite, and bentonite that have been made hydrophobic by treatment with organic cationic compounds. Typical examples of hydrophobized clays are stearalkonium bentonite, dimethyl disteal ammonium, disteardimonium hectorite, dimethylalkylammonium hectorite, benzyldimethylstearylammonium hectorite and distearyldimethylammonium chloride treated clays. disteardimonium hectorite is preferred.

The amount of hydrophobized clay present in the sunscreen composition ranges from 0.05% to 5%, especially from 0.1% to 1%, 1.5%, 2% by weight of the total composition. %, 2.5% or 3% by weight, more particularly 0.2% to 2% by weight.

Oil Components According to any one of the present embodiments, suitable oil components include vegetable oils, mineral oils (e.g. petrolatum), fatty esters (e.g. isopropyl palmitate, alkyl (C ₁₂ -C ₁₅ ) benzoates). ) (including such fatty esters with glycerol). It is desirable to include a combination of a "non-greasy" emollient and an oily feeling emollient. Non-greasy emollients and oily-feeling emollients will be understood through a description of materials and examples suitable for this type of emollient. For example, dicaprylyl carbonate is considered a "non-greasy" emollient in that it provides a smooth feel to the user's skin and is removed fairly quickly. One specific oily emollient is heptyl undecylenate, which is more oily and more difficult to remove from the user's skin.

Suitable oils for the invention include, but are not limited to: hydrocarbon oils of vegetable origin, such as liquid triglycerides of fatty acids containing 4 to 10 carbon atoms, such as heptanoic acid or octanoic acid. Triglycerides or, for example, sunflower oil, corn oil, soybean oil, marrow oil, grape seed oil, sesame seed oil, hazelnut oil, apricot oil, macadamia oil, arara oil, coriander oil, castor oil, avocado oil , caprylic/capric triglyceride, jojoba oil, shea butter and caprylyl glycol; synthetic esters and ethers, especially of fatty acids, such as Purcellin oil, 2-octyldodecyl stearate, 2-octyldodecyl erucate, Isostearyl isostearate; hydroxylated esters such as isostearyl lactate, octyl hydroxystearate, octyl dodecylhydroxystearate, diisostearyl malate or triisocetyl citrate; fatty alcohol heptanoate, octanoate or decanoate; Polyol esters, such as propylene glycol dioctanoate, neopentyl glycol diheptanoate and diethylene glycol diisononanoate; and pentaerythritol esters, such as pentaerythrityl tetraisostearate or Ajinomoto Co., Ltd., especially under the trade name Eldew SL 205. lauroylsarcosine isopropyl sold by Ajinomoto; linear or branched hydrocarbons of mineral or synthetic origin, such as volatile or non-volatile liquid paraffin and its derivatives, petrolatum, polydecene, isohexadecane, isododecane, hydrogenated Polyisobutene, for example a mixture of n-undecane (C ₁₁ ) and n-tridecane (C ₁₃ ), sold by BASF under the reference name Parleam oil or Cetiol® Ultimate; Fluorinated oils that are hydrocarbon-based and/or silicone-based, such as those described in the document JP-A-2-295912; silicone oils, such as linear or cyclic silicone chains that are liquid or pasty at room temperature. volatile or non-volatile polydimethylsiloxanes (PDMS), especially volatile silicone oils, especially cyclopolydimethylsiloxanes (cyclomethicone), such as cyclohexadimethylsiloxane and cyclopentadimethylsiloxane; pendant from the silicone chain or Polydimethylsiloxanes containing chain-terminated alkyl, alkoxy or phenyl groups, these groups containing from 2 to 24 carbon atoms; phenyl silicones, such as phenyltrimethicone, phenyldimethicone, phenyltrimethylsiloxydiphenylsiloxane, diphenyldimethicone , diphenylmethyldiphenyltrisiloxane or 2-phenylethyltrimethylsiloxysilicic acid and polymethylphenylsiloxane; mixtures thereof.

Suitable oil components include furthermore, for example, Guerbet alcohols based on fatty alcohols containing 6 to 18, preferably 8 to 10 carbon atoms, linear C _{6 to 22} fatty acids and linear or branched C ₆ Esters with _~22 fatty alcohols or esters of branched C _6-13 carboxylic acids with linear or branched C _6-22 fatty alcohols, such as myristyl myristate, myristyl palmitate, myristyl stearate, myristyl isostearate, oleic acid myristyl, myristyl behenate, myristyl erucate, cetyl myristate, cetyl palmitate, cetyl stearate, cetyl isostearate, cetyl oleate, cetyl behenate, cetyl erucate, stearyl myristate, stearyl palmitate, stearyl stearate, Stearyl isostearate, stearyl oleate, stearyl behenate, stearyl erucate, isostearyl myristate, isostearyl palmitate, isostearyl stearate, isostearyl isostearate, isostearyl oleate, isostearyl behenate, isostearyl oleate , oleyl myristate, oleyl palmitate, oleyl stearate, oleyl isostearate, oleyl oleate, oleyl behenate, oleyl erucate, behenyl myristate, behenyl palmitate, behenyl stearate, behenyl isostearate, behenyl oleate, behen Examples include behenyl acid, behenyl erucate, erucyl myristate, erucyl palmitate, erucyl stearate, erucyl isostearate, erucyl oleate, erucyl behenate, and erucyl erucate. Esters of straight-chain C _6-22 fatty acids with branched alcohols, more particularly 2-ethylhexanol, esters of C _18-38 alkylhydroxyl carboxylic acids with straight-chain or branched C _6-22 fatty alcohols, among others Dioctyl malate, esters of linear and/or branched fatty acids with polyhydric alcohols (e.g. propylene glycol, dimer diols or trimer triols) and/or Guerbet alcohols, triglycerides based on C _6-10 fatty acids, C _6-10 Liquid mono-, di- and triglyceride mixtures based on ₁₈ fatty acids, esters of C _6-22 fatty alcohols and/or Guerbet alcohols with aromatic carboxylic acids, more specifically benzoic acid, C _2-12 dicarboxylic acids and linear or branched alcohols containing 1 to 22 carbon atoms or polyols containing 2 to 10 carbon atoms and 2 to 6 hydroxyl groups, vegetable oils, branched primary alcohols, substituted cyclohexane, linear and Guerbet alcohol carbonates based on C _6-18 , preferably C _8-10 fatty alcohols, such as branched C _6-22 fatty alcohol carbonates, such as dicaprylyl carbonate (Cetiol® CC). , esters of benzoic acid with straight-chain and/or branched C _6-22 alcohols (e.g. Finsolv® TN), straight-chain or branched symmetrical or unsymmetrical dialkyls containing 6 to 22 carbon atoms per alkyl group Ethers, such as dicaprylyl ether (Cetiol® OE), ring-opening products of epoxidized fatty acid esters and polyols, silicone oils (cyclomethicone, methicone type silicon, etc.) and/or aliphatic or Naphthenic hydrocarbons such as squalane, squalene or dialkylcyclohexane are also suitable.

Further examples include benzoate esters of C ₉ -C ₁₅ alcohols, isononyl isononanoate, alkyl (C ₁₂ -C ₁₅ ) benzoates, or any combination thereof.

Specific examples of oils and/or emollients include cocoglyceryl, cyclomethicone, dimethicone, dicaprylyl maleate, tri(caprylic/capric) glyceryl, isopropyl myristate, octyl stearate, isostearyl linoleate, liquid Lanolin, coconut oil, cocoa butter, olive oil, avocado oil, aloe extract, jojoba oil, castor oil, fatty acids, oleic acid, stearic acid, fatty alcohol, cetyl alcohol, hexadecyl alcohol, diisopropyl adipate, hydroxybenzoic acid ester, Benzoic acid esters of C ₉ to C ₁₅ alcohols, isononyl isononanoates, alkanes, mineral oils, silicones, dimethylpolysiloxanes, ethers, polyoxypropylene butyl ether, polyoxypropylene cetyl ether, alkyl benzoates (C ₁₂ to C ₁₅ ), Included are arylalkyl benzoates, lauroyl sarcosine isopropyl and any combinations thereof.

In some preferred embodiments, oil components useful in the present invention include non-greasy emollients. Any suitable non-greasy emollient can be used, such as carbonates and esters of carbonates. A preferred carbonate ester is dicapryl carbonate, also known as dioctyl carbonate, dicaprylyl carbonate or dioctyl carbonate ester. Dicaprylyl carbonate is commercially available from BASF under the trade name Cetiol CC. Other useful carbonate esters include, but are not limited to, cetyl carbonate, cetearyl carbonate, stearyl carbonate, C ₁₂ -C ₁₅ alkyl carbonate esters, and the non-greasy emollients of the present invention. It is particularly useful in compositions of

The amount of oil component present in the sunscreen composition may range from 1% to 60%, in particular from 5% to 10%, 15%, 20%, 25%, 30% by weight of the total composition. , 35% or 40% by weight, more particularly 10% to 20%, 25%, 30% or 35% by weight.

Associative Polymer The composition of the present invention comprises at least one associative polymer. As used herein, the term "associative" polymer is defined as a water-soluble or water-swellable polymer that has chemically bonded groups that are capable of hydrophobic association similar to conventional surfactants. be done. As used herein, an attached "hydrophobic or hydrophobic group" is any chemical group that enhances water insolubility. Apart from its thickening effect, the associative polymer used in the present cosmetic composition is advantageously used as a film-forming agent formed from an aqueous medium.

In some preferred embodiments, the silicone-based hydrophobic polymer can be selected from dimethicone, amodimethicone, dimethiconol, silicone polyurethane silicone acrylate, or combinations thereof. Specifically, the polymer can be a silicone acrylate copolymer, such as a copolymer comprising a poly(alkyl)acrylate backbone and a dimethicone copolymer grafted to an acrylate side chain. By silicone-based is meant a hydrophobic polymer containing at least one silicone moiety. In particular, silicone acrylate copolymers, particularly copolymers comprising a poly(alkyl)acrylate backbone and a dimethicone polymer grafted to an alkyl ester side chain, such as cyclopenta, commercially available from Dow Corning under the trade name FA 4001 CM, cyclopentasiloxyna (and) (acrylates/polytrimethylsiloxy methacrylate) copolymer, FA 4002 Isododecane (and) (acrylates/polytrimethylsiloxy methacrylate) copolymer, commercially available from Dow Corning under the trade name ID, FA 4003 dimethicone (and) (acrylates/polytrimethylsiloxy methacrylate) copolymer, commercially available from Dow Corning under the trade name DM; isododecane (and) (acrylates/methacrylate), commercially available from Dow Corning under the trade name FA 4004 ID; (acrylates/polytrimethylsiloxy methacrylate) copolymer (acrylates/polytrimethylsiloxy methacrylate) copolymer, commercially available from Dow Corning under the trade name FA 4103 (and) laureth-1 phosphate, and FC-5002, commercially available from Dow Corning under the trade name IDD Examples include isododecane (and) (trimethylsiloxysilicic acid/dimethiconol) crosspolymers.

In some preferred embodiments, the associative polymer is an ethoxylated C ₈ -C ₃₀ , preferably a C ₁₂ -C ₃₀ , especially a C ₁₆ -C ₂₂ , more particularly a C ₁₈ -C ₂₂ fatty alcohol ( meth)acrylic acid ester and one or more monomers that are acrylic acid, methacrylic acid, or one of their simple esters; in some preferred embodiments, the associative polymer comprises , ethoxylated C ₈ -C ₃₀ , preferably C ₁₂ -C ₃₀ , especially C ₁₆ -C ₂₂ , more particularly itaconic esters of C ₁₈ -C ₂₂ fatty alcohols, and acrylic acid, methacrylic acid or simple compounds thereof. Includes copolymers with one or more monomers that are one of the esters. In some embodiments, the associative polymer is an ethoxylated C ₈ -C ₃₀ , preferably a C ₁₂ -C ₃₀ , especially a C ₁₆ -C ₂₂ , more particularly a (meth) of a C ₁₈ -C ₂₂ fatty alcohol. ) copolymers of acrylic esters and one or more monomers of acrylic acid, methacrylic acid or one of their simple esters or ethoxylated C ₈ -C ₃₀ , preferably C ₁₂ -C ₃₀ , In particular itaconic esters of C ₁₆ -C ₂₂ , more particularly C ₁₈ -C ₂₂ fatty alcohols and one or more monomers which are acrylic acid, methacrylic acid or one of their simple esters. The ethoxylated fatty alcohols, including copolymers, contain in each case 5 to 35, in particular 7 to 30 and more particularly 7 to 25 ethylene oxide (EO) groups. Non-limiting examples of these polymers include Tinovis® GTC (INCI: (acrylates/methacrylic acid beheneth-25) copolymer); Aculyn® 22 (INCI: (acrylates/methacrylic acid beheneth-25) copolymer); -20) copolymer); Aculyn® 88 (INCI: (acrylates/steareth methacrylate-20) crosspolymer; (acrylated/steareth itaconate-20) copolymer; (acrylates/cetheth itaconate-20) copolymer; and Acrylates/Palmeth25).

In some preferred embodiments, acrylamide methylpropane sulfonic acid (AMPS) and at least one compound containing from 8 to 30 carbon atoms, particularly from 10 to 30 carbon atoms, and more particularly from 12 to 22 carbon atoms. It is likewise possible to advantageously use associative polymers based on at least one ethylenically unsaturated monomer which contain one hydrophobic moiety, which hydrophobic group can furthermore contain at least one alkylene monomer. Oxide units, especially polyoxyalkylene chains, may also be included. This polyoxyalkylene chain can be formed from ethylene oxide units and/or propylene oxide units, more particularly from ethylene oxide units only, preferably at least one ethylenically unsaturated monomer. , ethoxylated alcohol RO-(CH ₂ CH ₂ O) _m H, in which R is an alkyl group having 12 to 30 carbon atoms and m is a number from 3 to 35, acrylic acid or methacrylic acid ester and CH ₂ = ^CH -COO-(CH ₂ ^CH ₂ -COO) _n and/or NH ₄ ⁺ ). In the case of copolymers, one or more structural units based on the following comonomers are preferably present in the copolymer: acrylic acid, methacrylic acid, acrylamide, dimethyl-acrylamide, vinylpyrrolidone (VP), acrylic acid. Hydroxyethyl and hydroxyethyl methacrylate. More particularly, suitable associative polymers are AMPS and (meth)acrylic acid esters of ethoxylated C ₈ -C ₃₀ or C ₁₀ -C ₃₀ or C ₁₂ -C ₂₂ or C ₁₂ -C ₁₈ fatty alcohols. It can be a copolymer with. In some embodiments, suitable associative polymers include AMPS and ethoxylated fatty alcohols containing in each case 5 to 35, especially 7 to 30, more particularly 7 to 25 ethylene oxides ( It may be a copolymer of ethoxylated C ₈ -C ₃₀ or C ₁₂ -C ₃₀ or C ₁₂ -C ₂₂ or C ₁₂ -C ₁₈ fatty alcohols with (meth)acrylic acid esters containing EO) groups. Suitable AMPS copolymers are, for example, (ammonium acryloyldimethyltaurate/beheneth methacrylate-25) copolymers, eg Aristoflex® HMB from Clariant, (ammonium acryloyldimethyltaurate/beheneth methacrylate-25) crosspolymers, eg , Aristoflex® BLV from Clariant, (ammonium acryloyldimethyltaurate/steareth methacrylate-25) crosspolymer, e.g. Aristoflex HMS® from Clariant, (ammonium acryloyldimethyltaurate/steareth methacrylate-8) copolymer , eg Aristoflex® SNC, (ammonium acryloyldimethyltaurate/laureth-7 methacrylate) copolymer, eg Aristoflex® LNC.

The amount of associative polymer present in the sunscreen composition may range from about 0.1% to 4%, particularly from about 0.2% to 1%, 1.5%, 2% by weight of the total composition. %, 2.5%, 3% or 3.5% by weight, more particularly about 0.2% to 1% by weight.

Emulsifier The composition of the present invention contains an emulsifier in an amount of about 0 to about 10%, preferably about 0 to 1%, 1.5%, 2%, 2.5%, 3% by weight of the total composition. %, 3.5%, 4%, 4.5%, 5% or 5.5%, 6%, 6.5%, 7%, 7.5% or 8% by weight %, more preferably from about 0 to 5% by weight. Suitable emulsifiers can be any of a wide variety of emulsifiers that can promote the formation of emulsions. Anionic or nonionic emulsifiers are preferred. Suitable types of emulsifiers include soaps; alkyl, aryl or alkylaryl or acyl modified forms of the following moieties: sulfates, ether sulfates, monoglyceryl ether sulfates, sulfonates, sulfosuccinates, ether sulfosuccinates, sulfosuccinates; Mention may be made of cinnamates, amidosulfosuccinates, carboxylates, amidoether carboxylates, succinates, sarcosinates, amino acids, taurates, sulfoacetates and phosphates; polyoxyethylene fatty ether phosphates, acyl lactylates, and mixtures thereof. Anionic emulsifiers of interest are phosphate esters, such as cetyl phosphate ester salts, such as potassium cetyl phosphate. In some embodiments, the composition can further include a nonionic, amphoteric or polymeric emulsifier. Classification of chemical substances suitable for nonionic surfactants includes, for example, ethoxylated amides, fatty acid amides, ethoxylated fatty acids, ethoxylated esters, ethoxylated ethers, ethoxylated alcohols, polyoxyethylene derivatives of polyol esters, Non-crosslinked silicone copolymers, e.g. alkoxy or alkyl dimethicone copolyols, silicones with pendant hydrophilic moieties, e.g. linear silicones with pendant polyether or polyglycerol groups and crosslinked containing at least one hydrophilic moiety Mention may be made of elastomeric solid organopolysiloxanes. Specific nonionic emulsifiers include, for example, adding 2 to 30 mol of ethylene oxide and/or 0 to 5 mol of propylene oxide to linear C _{8 to 22} fatty alcohols, C _{12 to 22} fatty acids, and 8 to 8 in alkyl groups. Additions to alkylphenols containing ~15 carbon atoms and to alkylamines containing 8 to 22 carbon atoms in the alkyl group; alkyl oligoglycosides containing 8 to 22 carbon atoms in the alkyl group and their Ethoxylated analogs; products of addition of 1 to 15 mol of ethylene oxide to castor oil and/or hydrogenated castor oil; products of addition of 15 to 60 mol of ethylene oxide to castor oil and/or hydrogenated castor oil; glycerol and/or partial esters of sorbitan with unsaturated linear or saturated branched fatty acids containing 12 to 22 carbon atoms and/or hydroxycarboxylic acids containing 3 to 18 carbon atoms, and these with 1 to 30 mol of ethylene oxide. products added to; polyglycerol (average degree of self-condensation 2-8), polyethylene glycol (molecular weight 400-5,000), trimethylolpropane, pentaerythritol, sugar alcohols (e.g. sorbitol), alkyl glucosides (e.g. methyl glucosides, butyl glucoside, lauryl glucoside, other C ₆ -C ₂₂ alkyl glucosides) and polyglucosides (e.g. cellulose) and saturated and/or unsaturated straight-chain or branched fatty acids containing 12 to 22 carbon atoms and/or or partial esters with hydroxycarboxylic acids containing 3 to 18 carbon atoms and the products of their addition to 1 to 30 mol of ethylene oxide; mixed esters of pentaerythritol, fatty acids, citric acid and fatty alcohols and/or 6 to 22 mixed esters, mono-, di- and trialkyl phosphates and mono-di- and/or tri-PEG-alkyl phosphates and salts thereof of fatty acids, methyl glucosides and polyols, preferably glycerol or polyglycerol, containing 5 carbon atoms. , wool wax alcohols, polysiloxane/polyalkyl/polyether copolymers and corresponding derivatives, block copolymers such as PEG-30 dipolyhydroxystearate; polymeric emulsifiers such as those of the Pemulen type from Goodrich (TR -1, TR-2), polyalkylene glycol, and glycerol carbonate. Products of addition of ethylene oxide and/or propylene oxide to fatty alcohols, fatty acids, alkylphenols or to castor oil are known commercial products. These are homologue mixtures whose average degree of alkoxylation corresponds to the ratio of the amount of ethylene oxide and/or propylene oxide and the substrate on which the addition reaction is carried out. The addition products of ethylene oxide to glycerol, C12/18 fatty acid monoesters and diesters, are known as refatting agents in cosmetic formulations. Sorbitan ester emulsifiers include sorbitan monoisostearate, sorbitan sesquiisostearate, sorbitan diisostearate, sorbitan triisostearate, sorbitan monooleate, sorbitan sesquioleate, sorbitan dioleate, sorbitan trioleate, sorbitan monoerucate, and sesquierucate. Sorbitan, sorbitan dierucate, sorbitan trierucate, sorbitan monoricinoleate, sorbitan sesquiricinoleate, sorbitan diricinoleate, sorbitan triricinoleate, sorbitan monohydroxystearate, sorbitan sesquihydroxystearate, sorbitan dihydroxystearate, trihydroxystearic acid Sorbitan, sorbitan monotartrate, sorbitan sesquitartrate, sorbitan ditartrate, sorbitan tritartrate, sorbitan monocitrate, sorbitan sesquicitrate, sorbitan dicitrate, sorbitan tricitrate, sorbitan monomaleate, sorbitan sesquimaleate, sorbitan dimaleate, trimaleic acid Mention may be made of sorbitan and its technical mixtures. Also suitable are products in which 1 to 30, preferably 5 to 10, mol of ethylene oxide are added to the mentioned sorbitan esters. Polyglyceryl-2 dipolyhydroxystearate (Dehymuls® PGPH), Polyglyceryl-3 diisostearate (Lameform® TGI), Polyglyceryl-4 isostearate (Isolan® GI34), Polyglyceryl-3 oleate , Diisostearoyl Polyglyceryl-3 Diisostearate (Isolan® PDI), Polyglyceryl-3 Methylglucose Distearate (TegoCare® 450), Polyglyceryl-3 Beeswax (Cer) aBellina (registered) ), Polyglycerol Caprate T2010/90, Polyglyceryl-3 Cetyl (Chimexane® NL), Polyglyceryl-3 Distearate (Cremophor® GS32), and Polyglyceryl-3 Ricinoleate (Cremophor® GS32). Polyglycerol esters include Admul® WOL 1403), Polyglyceryl Dimerate Isostearate and mixtures thereof. Other suitable polyol esters are, for example, mono-, di- and triesters of trimethylolpropane or pentaerythritol with lauric acid, coconut oil fatty acid, tallow fatty acid, palmitic acid, stearic acid, oleic acid, behenic acid, etc. optionally reacted with 1 to 30 mol of ethylene oxide.

Classification of chemicals suitable for amphoteric emulsifiers include alkylbetaines, amidoalkylbetaines, alkylamphoacetates, amidoalkylsultaines, amphophosphates, phosphorylated imidazolines, carboxyalkylalkylpolyamines, alkylaminodipropionates, and alkylamphoglycinates. (Mono or di); Alkyl amphopropionates, N-alkyl b-aminopropionic acids and alkyl polyaminocarboxylates. Suitable amphoteric surfactants include, for example, N-alkyl-N,N-dimethylammonium glycinates containing 8 to 18 carbon atoms in the alkyl or acyl group, such as coconut fatty acid alkyldimethylammonium glycinates. , N-acylaminopropyl-N,N-dimethylammonium glycinate, such as coconut oil fatty acid acylaminopropyldimethylammonium glycinate and 2-alkyl-3-carboxymethyl-3-hydroxyethylimidazoline and coconut oil fatty acid acylaminoethyl Hydroxyethylcarboxymethylglycinate, N-alkylglycine containing 8 to 18 carbon atoms in the alkyl group, N-alkylpropionic acid, N-alkylaminobutyric acid, N-alkyliminodipropionic acid, N-hydroxyethyl- Mention may be made of N-alkylamidopropylglycine, N-alkyltaurine, N-alkylsarcosine, 2-alkylaminopropionic acid and alkylaminoacetic acid. Particularly preferred amphoteric surfactants are N-cocoalkylaminopropionate, coconut fatty acid acylaminoethylaminopropionate and C _12/18 acylsarcosine.

In some embodiments, preferred emulsifiers for use in the present invention include polyglyceryl-2 dipolyhydroxystearate (Dehymuls® PGPH), cetyl PEG/PPG-10/1 dimethicone, PEG-10 dimethicone, Examples include lauryl PEG/PPG-18/18 methicone.

In some preferred embodiments, the sunscreen composition is an emulsifier-free composition that does not contain any emulsifiers. Conventional emulsifiers have been found to be potentially irritating to the skin and are therefore undesirable. Emulsifier-free cosmetic compositions of the prior art generally suffer from either instability, a narrow range of use, or a limited choice of starting materials. Furthermore, the fact is that prior art compositions typically contain little or even no oil or emollients. Another object of the present invention is to prepare emulsifier-free sunscreen compositions that do not have the disadvantages of the prior art and provide a satisfactory sensory experience. Surprisingly and unexpectedly, using the sunscreen compositions of the present invention has sufficient stability and cosmetic appeal, useful to avoid the drawbacks associated with conventional emulsifiers. It has been found that this is a promising approach to obtain emulsifier-free sunscreen cosmetics, with the aim of obtaining a product.

Polymer Powder The sunscreen composition of the present invention further comprises a polymer powder that imparts a silky, powdery skin feel to the composition. Examples of polymer powders include dimethicone crosspolymer, (dimethicone/vinyl dimethicone) crosspolymer, polymethylsilsesquioxane, polyethylene, and polymethylmethacrylate.

Benefit Agents As used herein, the term "benefit agent" should be understood broadly and, when included in appropriate amounts in a body cleansing composition, produces a hair and/or skin care effect. means an agent for which it is intended.

In addition to the above-mentioned ingredients, other ingredients used in cosmetics can be added to the sunscreen cosmetics according to the invention if desired, provided there are no adverse effects. Compositions of the invention may include one or more benefit agents such as starches, emollients; humectants; skin conditioning agents; waxes; alcohols; liquid oils; anti-acne agents such as tretinoin, isotretinoin, motretinide, adapalene, tazarotene, azelaic acid; anti-inflammatory agents such as ibuprofen, naproxen, hetprofen; plant extracts such as alnus, arnica, artemisia capillaris; It may further contain asiasarum root, calendula, chamomile; refreshing agent; nourishing agent; anti-wrinkle agent, fragrance, skin coloring agent.

Sunscreen compositions according to the invention optionally contain other ingredients, such as preservatives, such as benzyl alcohol, methylparaben, propylparaben, imidazolidinyl urea, sodium benzoate, potassium sorbate, salicylic acid, methylchloroisothiazo rinone and meisothiazolinone; pH adjusting agents such as citric acid, succinic acid, phosphoric acid, sodium hydroxide, sodium carbonate, etc. may further be included; and any other beneficial ingredients desired in the sunscreen composition. can be added to sunscreen compositions depending on their properties.

In one particular embodiment, the sunscreen composition according to the invention further comprises a fragrance or fragrance.

According to one optional embodiment of the invention, the sunscreen composition further comprises a carrier or mixture of such carriers suitable for application to the skin and/or hair. Suitable carriers for use in dermatological compositions include water, C ₁ -C ₆ alcohols, acetic acid lower alkyl esters, and mixtures thereof. In some embodiments, the carrier can also include various additional materials, such as acetone, hydrocarbons such as isobutene, hexane, decene, halogenated hydrocarbons, and volatile silicones such as cyclomethicone. The carrier is present in the composition in an amount ranging from about 0.5% to about 99%, preferably from about 5% to about 99%, more preferably from about 10% to about 98%, based on the total weight of the composition. exist.

The compositions of the invention include a cosmetically acceptable base. Cosmetically acceptable bases are preferably those that provide the product in cream, lotion, gel or emulsion form.

The term "cosmetically acceptable" refers to ingredients typically used in personal care compositions, and does not include materials that are toxic when present in typical concentrations in personal care compositions. , is intended to emphasize that it is not considered to form part of this invention.

According to an optional embodiment of the invention, the invention:
a) 5 to 50% by weight of at least one UV protection agent;
b) 0.05 to 5% by weight of at least one hydrophobized clay mineral;
c) 1 to 60% by weight of at least one oil component;
d) 0.1 to 4% by weight of at least one associative polymer;
A sunscreen composition comprising:
The UV protection agent is from the group consisting of ethylhexyl methoxycinnamate, ethylhexyl triazone, methylenebisbenzotriazolyltetramethylbutylphenol, bisethylhexyloxyphenolmethoxyphenyltriazine, diethylaminohydroxybenzoylhexylbenzoate, ethylhexyl salicylate, and combinations thereof. The associative polymer is selected; the associative polymer is a (meth)acrylate ester of an ethoxylated C ₈ -C ₃₀ , preferably a C ₁₂ -C ₃₀ , especially a C ₁₆ -C ₂₂ , more particularly a C ₁₈ -C ₂₂ fatty alcohol. and one or more monomers which are acrylic acid, methacrylic acid or one of their simple esters; ethoxylated C ₈ -C ₃₀ , preferably C ₁₂ -C ₃₀ , especially C ₁₆ - Copolymers of itaconic esters of C ₂₂ , more particularly C ₁₈ -C ₂₂ fatty alcohols, with one or more monomers which are acrylic acid, methacrylic acid or one of their simple esters; and acrylamide. Group consisting of copolymers based on methylpropanesulfonic acid and (meth)acrylic acid esters of ethoxylated C ₈ -C ₃₀ or C ₁₀ -C ₃₀ or C ₁₂ -C ₂₂ or C ₁₂ -C ₁₈ fatty alcohols the ethoxylated fatty alcohol contains in each case 5 to 35, in particular 7 to 30 and more particularly 7 to 25 ethylene oxide groups; the hydrophobized clay mineral contains stearalkonium From the group consisting of bentonite, dimethyl distearyl ammonium hectorite, disteardimonium hectorite, dimethylalkylammonium hectorite, benzyl dimethyl stearyl ammonium hectorite, magnesium aluminum silicate treated with distearyl dimethyl ammonium chloride, and combinations thereof. preferably disteardimonium hectorite; the oil component is selected from the group consisting of dicaprylic carbonate, cetyl carbonate, cetearyl carbonate, stearyl carbonate and mixtures thereof, preferably dicaprylic carbonate. relating to things.

According to an optional embodiment of the invention, the invention:
a) 5 to 50% by weight of at least one UV protection agent;
b) 0.05 to 5% by weight of at least one hydrophobized clay mineral;
c) 1 to 60% by weight of at least one oil component;
d) 0.1 to 4% by weight of at least one associative polymer;
A sunscreen composition comprising:
The UV protection agent is from the group consisting of ethylhexyl methoxycinnamate, ethylhexyl triazone, methylenebisbenzotriazolyltetramethylbutylphenol, bisethylhexyloxyphenolmethoxyphenyltriazine, diethylaminohydroxybenzoylhexylbenzoate, ethylhexyl salicylate, and combinations thereof. The associative polymers selected include (acrylates/steareth methacrylate-25) copolymer, (acrylates/steareth methacrylate-20) copolymer, (acrylates/steareth methacrylate-20) crosspolymer, (acrylate/steareth itaconate) -20) Copolymer; (acrylates/cetheth itaconate-20) copolymer and (acrylate/palmes itaconate-25) copolymer, (ammonium acryloyldimethyltaurate/beheneth methacrylate-25) copolymer, (ammonium acryloyldimethyltaurate/beheneth methacrylate) -25) Crosspolymer, (ammonium acryloyldimethyltaurate/steareth methacrylate-25) crosspolymer, (ammonium acryloyldimethyltaurate/steareth methacrylate-8) copolymer, (ammonium acryloyldimethyltaurate/laureth methacrylate-7) copolymer, and these the hydrophobized clay mineral is selected from the group consisting of a combination of; selected from the group consisting of magnesium aluminum silicate treated with distearyldimethylammonium and combinations thereof, preferably disteardimonium hectorite; the oil component is dicaprylic carbonate, cetyl carbonate, cetearyl carbonate, stearyl carbonate and It relates to sunscreen compositions selected from the group consisting of mixtures thereof, preferably dicaprylic carbonate.

Personal care compositions are typically prepared by mixing the individual ingredients using any conventional compounding techniques known in the art, such as conventional stirring, shaking or tumbling. These components can be supplied as concentrated solutions to be diluted and/or mixed in appropriate proportions by those skilled in the art. The invention relates to any concentrate used as a raw material for the ingredients for preparing the compositions of the invention, in particular concentrates containing limited amounts of water for several cost and environmental reasons. Contain things.

material

Measurements/Methods Film Application and Preparation 6 g of the sunscreen formulation is applied onto a PMMA board with a draw down device to obtain a uniform film that is a wet film with a thickness of 0.076 mm. The PMMA plate is then transferred to an oven and heated at 38° C. for at least 30 minutes to simulate film formation at skin temperature. Remove the prepared film from the oven.

Evaluation of Film Morphology, Roughness and Thickness The films were then evaluated using white light interferometry (WLI, BRUKER Contour GT-K) to obtain information about the morphology including film roughness and thickness. .
(Unit: nm) (Δ means the distance from each point on the film surface to the intermediate layer)

Roughness values are the average of the roughness parameters measured three times at each of three randomly selected locations on each film.

The surface roughness of the film was graded as follows:
Low roughness ++ (Δ<700nm)
Medium roughness + (Δ=700-3000nm)
Large roughness - (Δ>3000nm)

The initial thickness of the film was measured at the time the film was produced, and then the thickness after 30 minutes had passed at room temperature was measured. From this measurement, the film thickness variation Δd was determined as follows:
Δd=(film thickness measured at room temperature - initial film thickness)/initial film thickness

Film thickness can be measured by methods known to those skilled in the art, for example, using a combination of calipers and a calibrated microscope. The film thickness can also be determined by digitally processing a micrograph of a cross section of the film.

The variation in film thickness compared to the original thickness at the time of application is divided into three groups:
Small change ++ (Δd≦15%)
Moderate change + (Δd≦40%)
Large change -(Δd>40%)

Water resistance evaluation 0.03 g of the sunscreen formulation was applied to a 5 x 5 cm PMMA board. The PMMA plate was placed in an environmentally controlled room with a temperature of 23° C. and a humidity of 60% for 30 minutes. The PMMA board was then fixed on a silica gel board with a black background, and the surface of the PMMA board was sprayed with water four times from a distance of 10 cm using a spray bottle filled with tap water. Photographs were taken (by Canon 6D Mark II) at T ₁ (before water spraying) and T ₂ (after water spraying) to record the water droplets mixed with the dissolved sunscreen product. The photographs were then analyzed using photo analysis software ImageJ to calculate the change in the shaded area (Δarea%):
ΔArea% = 1-(T ₁ -T ₂ )/T ₁

The smaller the rate of change, the higher the water resistance. The water resistance results were divided into three different categories:
Strong water resistance ++ (Δarea%≦15%)
Moderate water resistance + (Δarea%≦40%)
Weak water resistance - (Δarea%>40%)

Adhesion of Films to Evaluate Dust Control Efficacy 4 g of sunscreen formulation was placed on a PMMA board and then the drawdown equipment with bar coater was started: 3 mil wet film. An additional 2 g of sunscreen formulation was added to obtain a uniform film. The PMMA plate was then placed in an oven at 38°C for 30 minutes. 2 g of standard sand (Sigma-Aldrich, 5 μm) was weighed out and placed in a Petri dish, and the film-covered PMMA plate was placed on the Petri dish so that the film was in contact with the sand. The PMMA plate and Petri dish were turned over and gently shaken for 30 seconds to confirm that the entire area coated with the film was covered with sand. The PMMA plate was then removed and the sand remaining in the Petri dish was measured and weighed.

Adhesion rate (%) = ((Initial weight of sand in Petri dish - Weight of sand remaining in Petri dish) / Initial weight of sand in Petri dish) x 100%

The lower the adhesion rate (%), the higher the dustproof effect. The dustproofing effect was rated into three categories:
High dustproof effect ++ (adhesion rate (%) = 10% to 30%)
Moderate dustproof effect + (adhesion rate (%) = 30% to 50%)
Poor dustproofing effect - (Adhesion rate (%) > 50%

prescription

Evaluation results

The test results demonstrate that the film morphology, water resistance, and This shows that advantageous technical effects can be obtained in terms of safety and dust-proofing effects.

Claims (11)

A sunscreen composition comprising:
a) 5 to 50% by weight of at least one UV protection agent;
b) 0.05 to 5% by weight of at least one hydrophobized clay mineral;
c) 1 to 60% by weight of at least one oil component;
d) 0.1 to 4% by weight of at least one associative polymer;
A sunscreen composition comprising: The associative polymer is a silicone acrylate polymer; (meth)acrylic acid ester of an ethoxylated C ₈ -C ₃₀ , preferably C ₁₂ -C ₃₀ , more preferably C ₁₆ -C ₂₂ fatty alcohol, acrylic acid, methacrylate; Copolymers with one or more monomers of acids or one of these simple esters; ethoxylated C ₈ -C ₃₀ , preferably C ₁₂ -C ₃₀ , especially C ₁₆ -C ₂₂ , more particularly is a copolymer of itaconic esters of C ₁₈ -C ₂₂ fatty alcohols and one or more monomers which are acrylic acid, methacrylic acid or one of their simple esters; and acrylamide methylpropanesulfonic acid; Copolymers based on (meth)acrylic acid esters of ethoxylated C ₈ -C ₃₀ or C ₁₀ -C ₃₀ or C ₁₂ -C ₂₂ or C ₁₂ -C ₁₈ fatty alcohols; Item 1. The sunscreen composition according to item 1. The associative polymer comprises a (meth)acrylic ester of an ethoxylated _C8 - _C30 , preferably _C12 - _C30 , especially _C16 - _C22 , more particularly _C18 - _C22 fatty alcohol; Copolymers with one or more monomers of acrylic acid, methacrylic acid or one of their simple esters; ethoxylated C ₈ -C ₃₀ , preferably C ₁₂ -C ₃₀ , especially C ₁₆ -C ₂₂ , more particularly copolymers of itaconic esters of C ₁₈ -C ₂₂ fatty alcohols and one or more monomers which are acrylic acid, methacrylic acid or one of their simple esters; and acrylamide methylpropane. Copolymers based on sulfonic acids and (meth)acrylic acid esters of ethoxylated _C8 - _C30 or _C10 - _C30 or _C12 - _C22 or _C12 - _C18 fatty alcohols; Sunscreen composition according to claim 1 or 2, wherein the ethoxylated fatty alcohol contains in each case 5 to 35, in particular 7 to 30, more particularly 7 to 25 ethylene oxide groups. . The associative polymers include (acrylates/beheneth methacrylate-25) copolymer), (acrylates/steareth methacrylate-20) copolymer, (acrylates/steareth methacrylate-20) crosspolymer, (acrylate/steareth itaconate- 20) Copolymer; (acrylates/cetheth itaconate-20) copolymer and (acrylate/palmes itaconate-25) copolymer, (ammonium acryloyldimethyltaurate/beheneth methacrylate-25) copolymer, (ammonium acryloyldimethyltaurate/beheneth methacrylate- 25) Crosspolymer, (ammonium acryloyldimethyltaurate/steareth methacrylate-25) crosspolymer, (ammonium acryloyldimethyltaurate/steareth methacrylate-8) copolymer, (ammonium acryloyldimethyltaurate/laureth methacrylate-7) copolymer, and these A sunscreen composition according to any one of claims 1 to 3, selected from the group consisting of a combination. The UV protection agent is a group consisting of ethylhexyl methoxycinnamate, ethylhexyl triazone, methylenebisbenzotriazolyltetramethylbutylphenol, bisethylhexyloxyphenolmethoxyphenyltriazine, diethylaminohydroxybenzoylhexylbenzoate, ethylhexyl salicylate, and combinations thereof. A sunscreen composition according to any one of claims 1 to 4, selected from: The hydrophobized clay mineral was treated with stearalkonium bentonite, dimethyl disteal ammonium hectorite, disteardimonium hectorite, dimethylalkylammonium hectorite, benzyldimethylstearylammonium hectorite, distearyldimethylammonium chloride. Sunscreen composition according to any one of claims 1 to 5, selected from the group consisting of magnesium aluminum silicate and combinations thereof; preferably disteardimonium hectorite. A sunscreen composition according to any one of claims 1 to 6, wherein the oil component is selected from the group consisting of dicaprylic carbonate, cetyl carbonate, cetearyl carbonate, stearyl carbonate and mixtures thereof. It further comprises one emulsifier, preferably the emulsifier is polyglyceryl-2 dipolyhydroxystearate, cetyl PEG/PPG-10/1 dimethicone, PEG-10 dimethicone, lauryl PEG/PPG-18/18 methicone, or these. A sunscreen composition according to any one of claims 1 to 7, which is a mixture of. A sunscreen composition according to any one of claims 1 to 7, which is an emulsifier-free sunscreen composition. A method of achieving improved sunscreen protection, comprising applying to the skin a composition according to any one of claims 1 to 9. Use of a composition according to any one of claims 1 to 9 for sunscreen protection of the skin.